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Juyushi Mosque

Juyushi Mosque is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Juyushi Mosque rather than just read about it. In short: The Juyushi Mosque (Arabic: الجامع الجيوشى, lit. 'Mosque of the Armies') is a historic monument in Cairo, Egypt. The mosque is dated from 1086 CE, during reign of the Fatimid Imam-Caliph al-Mustansir Billah.

Juyushi Mosque — main illustration
Juyushi Mosque — illustration

Key takeaways

  • Juyushi Mosque belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Juyushi Mosque to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Juyushi Mosque from memory before moving on to harder problems.

Reference excerpt

The Juyushi Mosque (Arabic: الجامع الجيوشى, lit. 'Mosque of the Armies') is a historic monument in Cairo, Egypt. The mosque is dated from 1086 CE, during reign of the Fatimid Imam-Caliph al-Mustansir Billah. Its construction was sponsored by Badr al-Jamali, the vizier of al-Mustansir, who was Amir al-Juyush (Arabic: امير الجيوش, lit. 'Commander of the Armies'). It is located on the Muqattam hills above the Southern Cemetery of Cairo.

Historical background The building's construction is dated by an Arabic foundation inscription from 478 AH (1085/1086 CE), during the Fatimid period and the reign of al-Mustansir Billah. The inscription identifies the structure as a mashhad (Arabic: مشهد, lit. 'shrine'), meaning a commemorative shrine or mausoleum. It is not clear whom the mashhad commemorates or what its exact function was. The most plausible theory is that the monument commemorates the victories of Badr al-Jamali, the powerful Fatimid vizier whose title, Amir al-Juyush ("Commander of the Armies"), is invoked in the foundation inscription. Badr al-Jamali himself was not buried here, but rather in a tomb outside Bab al-Nasr, according to al-Maqrizi. The structure's isolated setting on the Muqattam hills above Cairo is also unusual and has even led to one scholarly theory suggesting it was actually a watchtower disguised as a mosque. In 1731–2, during the Ottoman period, the building was restored and some painted decoration was added to the interior. In the 1990s the mosque underwent a major renovation organized and funded by the Dawoodi Bohra community, who restored several other Fatimid-era mosques in Cairo around this time. Some historical details, including Ottoman decoration, were eliminated during the restoration. As of 2018, the mosque was situated inside a military zone and was not open to visitors without special permission.

Architecture

General

The building, often described as a mosque, is the most complete mashhad (commemorative shrine) to survive from the Fatimid period. It is centered around a small courtyard, which is entered from the outside through a plain door and passage. On one side of the courtyard is the prayer hall or sanctuary, while opposite this, standing on the central axis of the building, is a minaret. On the other two sides of the courtyard are rooms, as well as a passage leading to a small domed room projecting from the rest of the building. Small rooms also flank the minaret. The prayer hall is entered from the courtyard via a large keel arch flanked by two smaller arches with supporting columns, an arrangement that recurs in Fatimid architecture. Beyond this is a rectangular space covered by cross-vaults, followed by a roughly square area covered by a dome, flanked by two more spaces each covered by a cross-vault. The dome rests on an octagonal base with four plain squinches. The mihrab (niche symbolizing the qibla) is covered in elaborate stucco decoration. The conch or semi-dome section of the mihrab once contained 18th-century painted decoration from the Ottoman period, but this decoration was destroyed during the modern Bohra restoration. Stucco decoration also exists in the form of a medallion inscription at the summit of the dome and an inscription band along around the top of the chamber below the dome. The minaret has a similar design to that of the Great Mosque of Kairouan and it is also the earliest example in Egypt of a minaret with multiple tiers of different designs. It is composed of a large rectangular (or cuboid) section, above which is a smaller square section that is topped by a dome with the same profile as the semi-dome of the mihrab. Along the top of the minaret's first rectangular portion is a cornice of muqarnas (stalactite-like sculpting) which is the earliest surviving example of this type of decoration in Egypt.

Inscriptions

Over the entrance there is an inscription which begins with Qur'anic verses 72:18 and 9:108; translated into English as:

And the places of worship are for God, so invoke not any one along with God. Never stand thou forth therein. There is a mosque whose foundation was laid from the first day on piety; it is more worthy of the standing forth therein. In it are men who love to be purified; and God loves those who make themselves pure.

The inscription further continues:

The construction of this blessed martyrium [mashhad] was ordered by the servant of our lord and master Imam al-Mustansir billah, Commander of the Believers, may the blessings of God be upon him and upon his forefathers, the pure imams, and upon his most magnanimous descendants and peace until the Day of Judgment - the most illustrious lord commander of the armies, sword of Islam, helper of the imam, surety of the judges of the Muslims and guide to the propagandists of the believers - may God strengthen through him the religion, and give pleasure to the Commander of the Believers by the length of his stay, and make his power lasting and make his word prevail and deceive his enemies and those envious of him as he seeks the good pleasure of God, in the month of Muharram 478 [1085 CE].

The mihrab is decorated with an inscription of Qur'anic verses the begins outside the mihrab niche and finishes inside it. The first verse is 24:11, followed by 24:36 and the beginning of 24:37, and finishing with verse 10:23 inside the mihrab; translated into English as:

Those who come with the slander are a band of you; do not reckon it evil for you; rather it is good for you. Every man of them shall have the sin that he has earned charged to him; and whosoever of them took upon himself the greater part of it, him there awaits a mighty chastisement. In temples [buyut] God has allowed to be raised up, and His Name to be commemorated therein; therein glorifying Him, in the mornings and the evenings, are men whom neither commerce nor trafficking diverts from the remembrance of God and to perform the prayer, and to pay the alms, fearing a day when hearts and eyes shall be turned about.

… excerpt ends here. Continue reading the full article.

Illustrations

Juyushi Mosque illustration
Juyushi Mosque illustration
Juyushi Mosque illustration
Juyushi Mosque: Exterior of the mosque, with the minaret rising on the right
Exterior of the mosque, with the minaret rising on the right
Juyushi Mosque: Inscription at the summit of dome
Inscription at the summit of dome

Worked examples

Example 1 — a first encounter with Juyushi Mosque

Start with the simplest possible case. Write down what Juyushi Mosque claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Juyushi Mosque before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Juyushi Mosque ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Juyushi Mosque

In research
Juyushi Mosque appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Juyushi Mosque in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Juyushi Mosque is common in secondary-school and first-year university syllabi. It links to neighbouring topics 11th-century establishments in the Fatimid Caliphate, Buildings and structures completed in 1086, Fatimid architecture in Cairo, so understanding it makes those chapters shorter.
In everyday life
Look for Juyushi Mosque outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Juyushi Mosque in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Juyushi Mosque means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Juyushi Mosque out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Juyushi Mosque in simple terms?

The Juyushi Mosque (Arabic: الجامع الجيوشى, lit. 'Mosque of the Armies') is a historic monument in Cairo, Egypt. The mosque is dated from 1086 CE, during reign of the Fatimid Imam-Caliph al-Mustansir Billah.

Why does Juyushi Mosque matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Juyushi Mosque?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Juyushi Mosque.

Tags

  • 11th-century establishments in the Fatimid Caliphate
  • Buildings and structures completed in 1086
  • Fatimid architecture in Cairo
  • Fatimid mosques
  • Mosque buildings with domes in Egypt
  • Mosque buildings with minarets in Egypt
  • Mosques completed in the 1080s
  • Mosques completed in the 11th century
  • Mosques in Cairo
  • Shia mosques in Egypt

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